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2 g x ( 6.022 x 1023 molecules / 1 mole) x ( 1 mole / 79.9 g) x (3 atoms / molecule)
= 4.522 x 1022 atoms
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How many atoms are in 1.7 g C?
1.7 grams * (1mole/ 12.011 grams) * (6.023x 10^23 atoms/ 1 mole) =8.525 * 10^ 22 atoms carbon round to 2 sig. figs
How many aluminum atoms are there in a mass of 16.2 grams?
16. 2 grams aluminum (1 mole Al/26.98 grams)(6.022 X 1023/1 mole Al) = 3.62 X 1023 atoms of aluminum -------------------------------------------
What are the elements in beryllium chloride?
The structure of solid BeCl2 is an unusual chain polymer with two chlorine atoms bridging between the Be atoms. The ClBeCl bond angle is less than tetrahedral, at 980 . It therefore achieves an octet of electrons and has an approximate hybridisation of sp3 . The structure of liquid is dimeric with 2 chlorines bridging, Be does not achieve the octet in this. In the gas the dimer persists up to around 900 0when it is fully dissociated into the linear Cl-Be-Cl monomer. This is linear as predicted by VSEPR.
How many hydrogen atoms are in 738 grams of water?
Quite a few! 738 grams water (1 mole H2O/18.016 grams)(2 mole H/1 mole H2O)(6.022 X 10^23/1 mole H) = 4.93 X 10^25 atoms of hydrogen
How many nitrogen atoms are there in 7.5 g of CaNO32?
The species is; Ca(NO3)2 ( NO3(-) is a polyatomic ion and is in parenthesis ) 7.5 grams Ca(NO3)2 (1 mole Ca(NO3)2/164.1 grams)(2 mole N/1 mole Ca(NO3)2)(6.022 X 10^23/1 mole N) = 5.5 X 10^22 atoms of nitrogen
Does Be only have 4 electrons shared in BeCl2?
No. Beryllium has only two valence electrons and forms ionic bonds with chlorine, not covalent bonds. Beryllium atoms form 2+ ions, and chlorine atoms form 1- ions in order to form the ionic compound beryllium chloride, BeCl2.
How many carbon atoms are in 2 grams of 1 carat diamond?
1.004x1023
Why is BeCl2 soluble in water whereas group 2 elements are not?
Although the group 2 metals are not soluble in water in and of themselves, many of their compounds are. Elemental beryllium consists of neutral metal atoms while BeCl2 contains positive Be2+ ions and negative Cl- ions. The water molecule is a polar molecule, possessing a partial positive charge on the hydrogen and a partial negative charge on the oxygen. One end of the water molecule is attracted to the oppositely charge ion in BeCl2. This attraction is strong enough to pull apart the BeCl2 crystal structure.
What is the mass in grams of 2x1012 atoms of potassium?
What is the mass, in grams, of 2 × 1012 atoms of potassium?
How many atoms are in 1.7 g C?
1.7 grams * (1mole/ 12.011 grams) * (6.023x 10^23 atoms/ 1 mole) =8.525 * 10^ 22 atoms carbon round to 2 sig. figs
How many aluminum atoms are there in a mass of 16.2 grams?
16. 2 grams aluminum (1 mole Al/26.98 grams)(6.022 X 1023/1 mole Al) = 3.62 X 1023 atoms of aluminum -------------------------------------------
What are the elements in beryllium chloride?
The structure of solid BeCl2 is an unusual chain polymer with two chlorine atoms bridging between the Be atoms. The ClBeCl bond angle is less than tetrahedral, at 980 . It therefore achieves an octet of electrons and has an approximate hybridisation of sp3 . The structure of liquid is dimeric with 2 chlorines bridging, Be does not achieve the octet in this. In the gas the dimer persists up to around 900 0when it is fully dissociated into the linear Cl-Be-Cl monomer. This is linear as predicted by VSEPR.
Lewis structure of BeCl2?
For this dot structure, start with the Be atom in the center. On the left and right sides are a single bond attached to a Cl atom. The unbonded sides of the Cl atoms then each have a pair of dots.
How many grams of hydrogen are there in 207 grams of water?
1 third because water is composed by 2 oxygen atoms and 1 of hidrogen, so 207÷3=69 grams.
How many atoms of hydrogen 31 grams in CH2O?
31 grams CH2O (1 mole CH2O/30.026 grams)(2 mole H/1 mole CH2O)(6.022 X 1023/1 mole H) = 1.2 X 1024 atoms of hydrogen =======================
What is the net ionic equation of BeCl2 plus NaOH?
BeCl2(aq) + 2NaOH(aq) -> 2NaCl(aq) + Be(OH)2(s) Be(aq) + 2OH(aq) -> Be(OH)2(s) Hope this helps!
How many atoms are in magnesium?
how many atoms are there in magnesiumoxide 2 atoms are in magnesium 2 atoms are in magnesium
